Apple's Phil Shiller has been trash-talking Android in the press these past few days - just as Samsung is about to launch its Galaxy S4. "Public, preemptive slamming of a competitor is far outside Apple's PR wheelhouse; it's a dramatic shift for a company used to making news rather than reacting to it. But why is it happening?" The Verge hits the nail on the head: "Cupertino's behavior this week is yet another symptom of Samsung's stratospheric rise in the smartphone market globally, a rise that challenges Apple and has outright stifled Android competitors like HTC and Sony."

Yes, but RAM also uses up the precious power budget. There is in fact no point in caching a whole application inside the RAM if you just need a background thread to do perform some simple, non-visual tasks such as downloading.